Transmission gear



Feb. 2@, 1923.

E. C. BLACKWELL.

TRANSMISSION GEAR.

man Aue.27. 19:9.

01. li/lissouri, have invented certain Patented chi EU, 1

are.

" in i ELMER o. BLACKWELL, on sronn HILL, rrssonnr.

fapplication filed [ha 1919.

'rnansinrssron GEAR.

To all whom a may concern:

Be it known that I, ELMER C. BLAoKwnLL,

acitizenof the United States, resin ling at Stone Hill, in the county of Dent andState comprising a series s to form a transmissio employed in connection with an automobile the automobile.

engine whereby the gears arranged so as n gearing unit to be drive shaft may be driven at diiterent speeds controlled the varying speeds oi. the

i one of the primary tlon 18110 pro 1 engine and speed of objects otlthe invenvide an apparatus oi thischan acter which WlllllaVe a seriesot intermeshgear always in engagementand which will not require shifting or otheirwisetmoying the gears msm. A further ob ect of which constitute the mecha this invention is the provision of a device of this character which consists of comp simple in construction r is to be a tion, and

e trated adapted to withstand which devices of this rily subjected. For a full descr the advantages and me had to the followin accompanylng drawings,

Figure 1. 1s a plan-view aratively few parts and is but durable and well the rough usage to character are ordmaiption ol the invention and rits thereof. reference g description and in which:

of the mechanism constructed in accordance with my inven- Figure 2 is a section taken approximately on the line 2-2 of Fig.1, portions ofsome of the gears being shown diagrammatically.

Referring to the drawings wherein 1s illusthe preferred the engine form of my invention, 1 I a in whlch like numerals of reference indicate parts throughout the shaft 1 has keyed large wheel 11 which i uis rotatable with the engine shaft. Mounted a worm 4 which is mou .tor rotation on the engine which carries a worm gear shaft is-a sleeve 3 and a gear wheel 9. The worm gear 3 is in mesh with auxiliary shaft 2 whicl nted on one end of an 1 extends at right angles to the engine shaft and carries at its opposite end abeveled gear 5 which meshes new and TTBJIISmISSlOII following, is a'specnicamechanism power is applied to the 1 submitted for Serial no. 320,128.

pinion :6 on a counter shaft 7 provided at one end with a with a beveled the latter'bein gear wheel r y fllhedriven shai't15 is in longitudinal allnement with the engine shaft and the gears 12 and 1e are rigidly secured to the shaft 15 to turn the latter. Asshown in l 'ig. 2 the wheel ll is provided with a plurality of stud shafts 16. which are arranged near the periphery of the wheel 1 and are circumferentially s paceda iart and each stud shaft 16 has its ends pro ected beyond the opposite sides of the wheel 11 and supports the gears 10 and 12. The gears 10 mesh with the gear wheel tion of a possible arrangement of gears is consideration. r In the construction shown the gears 9 and 10 have equal numbers of teeth while the gears 13 each has the same number ofteeth which number is greater than the number of teeth on the gear 12. Itthe shaft 2 were not driven but the shaft 1 were in motion as shown by the arrow on that shaft then the plate 11 would rotate and carry with it the gears 10,-Which, owing to their meshing with their gears 9,would rotate they were carried around said gear 9. Since the gears 13 and gears 10 revolve together this would cause motion of the gears 13 at the same number of revolutions per minute and inthe same direction as the gears 10 Since the gears 13 have more teeth than the gear 12 this gear would be turned backward from the dlreetion otrevolution of the shait 1.

spending on the ratio between the gears 13 and 12 the backward revolution would be 1 gear 9 and the worm 4 will be rotated in the same direction as the shaft 1. Now dependingon the ratio of the gear train including; the gears 1e, 8, 6 and 5 the speed of revolution of the shaft 9 will be of a definite ratio to the speed of the shaft 1. In any event this movement of the gear 9 in this manner varies from a slow movement at the start when the worm is driven slowly to a rapid final movement.

T he foregoing description and accompanying drawing have reference to what might be considered to be the approved or preferred form of my invention. I desire it to be understood that I may make such changes in the construction, combination and arrangement of parts, materials, dimensions, et cetera, as may prove expedient and fall within the scope of the appended claims.

Having thus fully described my invention What I claim as new and desire to secure by Letters Patent, is 1' 1. A transmission gearing mechanism comprising a drive shaft, a driven shaft, a wheel fixed to the drive shaft and provided with circumferentially spaced stud shafts, gears mounted on the extended ends of the stud shaft at one side ofthe said wheel, smaller gears mounted on the extended end of the stud shafts at the opposite side of the said wheel, gearing mechanism mounted on the said driven shaft andengageable with the larger gears on the said stud shafts, a sleeve provided with gears fixed thereto on the said drive shaft and movable independently of the drive shaft, gearing mechanism connectthe'gears on the said driven shaft with the said gears on the said sleeve, one of the said gea'rs on the said sleeve being in mesh with the said smaller gears on the extended ends of the stud shaft.

2. A transmission gearing mechanism comprising a drive shaft and a driven shaft having adjacent ends, a plurality of independently rotatable gears connected in corresponding pairs, arranged in circumferentially spaced apart relation about the adjacent ends of the two shafts and supported. radially from the drive shaft to revolve therewith, the gears of each pair uniformly varying in size, a gear disposed centrally of the smaller gears of each pair and supported loosely upon the drive shaft for independent reverse rotation with respect thereto, said center gear corresponding in size to the said smaller circumferential gears and in mesh therewith for accelerating the independent rotation of the smaller gears as each pair revolves with the drive shaft, a gear fixed on the driven shaft and disposed centrally of the larger gears of each pair, and in mcsh therewith, said fixed, center gear being of smaller diameter than the larger circumferential gear and rotatable thereby for turning the driven shaft, and a gear mechanism connecting the fixed and loose center gears for the transmission of power from theformer to the latter, said mechanism being geared to rotate the loose center gear reversely to the direction of rotation of? the driving shaft and at a given gear reduction In testimony whereof I aflix my signalmv in presence of two witnesses.

ELMER C. BLACKWELL. lVitnesses E. \V. BENNETT, H. A. BENNETT. 

